Smartags have been discontinued.

When purchasing the SmarTag from the Samsung website, they indicate that the product is not available.

This means that they will no longer be manufactured or that they will be discontinued.
I would like to know Samsung’s official position on the continuity of this product.

The links in the US site do not lead to any place to purchase them and are not available on Amazon either. I assume that they just ran out of them.

One of the gossip sites Sammobile says a new version will be introduced for the holiday season.

Samsung Developer Relations